A spokesperson for the actor who played Screech said tests were being done and "it doesn't look good."
A group of scientists is urging the World Health Organization to take the threat of airborne transmission of the coronavirus more seriously.
Several college students continued to attend parties in Alabama after testing positive for COVID-19.
Coronavirus survivors are opening up about their experiences with the disease that has killed more than 100,000 people worldwide.
Can blood from COVID-19 survivors help other people fight the illness?
The latest weekly CDC figures show that vaping-related illnesses are still rising across the country, but at a slightly slower pace.
Toxic chemical fumes may be the cause of the mysterious lung illnesses linked to vaping.
At least six American tourists have died at the Dominican Republic this year but there are still no answers for the cause of their deaths.
The singer has been plagued by medical issues on the Australian leg of her world tour.
"I always worry that I’ll be defined by something that most people don’t even fully understand."